Comment by pclmulqdq
2 days ago
I'm not even sure mainline Linux supports machines this old at this point. The cmpxchg16b instruction isn't that old, and I believe it's required now.
2 days ago
I'm not even sure mainline Linux supports machines this old at this point. The cmpxchg16b instruction isn't that old, and I believe it's required now.
CMPXCHG8B is required as of a month or two ago, not 16B (i.e., the version from the 90's is now required)
See https://lkml.org/lkml/2025/4/25/409
32 bit Linux is still supported by the kernel and Debian, Arch, and Fedora still supports baseline x86_64.
RHEL 8 is still supported and Ubuntu is still baseline x86_64 I believe for commercial distros. Not sure about SuSE.
> 32 bit Linux is still supported by the kernel and Debian
Deprecated for Debian
https://www.debian.org/releases/stable/release-notes/issues....
>> 32 bit Linux is still supported by the kernel and Debian
> Deprecated for Debian
> https://www.debian.org/releases/stable/release-notes/issues....
32 bit Linux is still supported by the kernel... and... 'Debian, Arch, and Fedora still supports baseline x86_64'.
Please do not take things out of context.